#define  _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
int main()
{
	int total = 0;
	int avg = 0;
	int arr[10] = { 0 };
	int i = 0;
	for (i = 0; i < 10; i++)
	{
		scanf("%d", &arr[i]);
	}
	for (i = 0; i < 10; i++)
	{
		total = total + arr[i];
	}
	avg = total / 10;
	printf("%d", avg);
	return 0;
}